The cooling rate effect on structure and flux pinning force of FeTeSe single crystal deposited by self-flux method

Farisoğulları, Derya; Güler, Nilay Kantarcı; Yakinci, K.; Ekicibil, Ahmet; Karadağ, Faruk; Yakıncı, M. E.; Özçelık, Bekir

doi:10.1007/s10854-018-8629-8

Cited by 7 publications

(3 citation statements)

References 30 publications

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“…For all the samples, flat surfaces with the stacking of multiple layers can be seen. Similar results for the macrostructure of single‐crystalline samples can also be seen in previous reports . The surfaces of samples are generally oxidized on exposure to air, and it is hard to prevent the samples from oxidation, so we performed the measurements on the freshly cleaved pieces of the samples for minimum contamination.…”

Section: Resultsmentioning

confidence: 85%

Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals

Kumar

Varma

2019

Physica Status Solidi (b)

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Single‐crystalline samples of nominal compositions FeTe0.88 and FeTe1−xSex are synthesized using the self‐flux method. The activation energy of the flux flow is estimated using the Arrhenius relation as well as by the modified thermally activated flux flow (TAFF) model. The field dependence of U0 shows transition from single to collective vortex pinning at a magnetic field of ≈2 T. The analysis of field‐dependent U0 data reveals the planar and the point defect magnetic field regions for both the models. The modified TAFF model is used to study the 2D and 3D behavior of the vortex state for all the superconducting samples. The single‐crystalline FeTe0.80Se0.20 and FeTe0.60Se0.40 samples show 3D behavior, whereas the FeTe0.40Se0.60 crystal shows 2D behavior. The vortex phase diagrams of all the superconducting samples are obtained by analyzing the magnetotransport data. The vortex phase diagrams reveal transitions from the unpinned to pinned vortex liquid state and the vortex liquid to vortex glass state. Below T*, the critical exponent s is in good agreement with q values for 2D/3D behavior of vortex states of all the superconducting samples.

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Section: Resultsmentioning

confidence: 85%

Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals

Kumar

Varma

2019

Physica Status Solidi (b)

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“…From the obtained FE-SEM image, we can clearly see the stacking of multiple layers and similar macrostructure has been observed for single crystals of FBSCs. [38,39] Energy-dispersive X-ray (EDX) measurement has also been performed to confirm the elemental composition. The inset in Figure 2 shows the peaks of the elements present in the sample.…”

Section: Microstructural Propertiesmentioning

confidence: 99%

Investigation on Magnetotransport Properties and Specific Heat Capacity of FeTe_0.58Se_0.42 Single Crystals Grown by Self‐Flux Method

Miglani,

Chauhan,

Varma

2023

Physica Status Solidi (a)

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A comprehensive study of magnetotransport and field‐dependent specific heat of FeTe0.58Se0.42 single crystals synthesized using the self‐flux method is reported. The transport measurement reveals the presence of Fermi liquid behavior in the normal state resistivity of the single crystals. Furthermore, the grown single crystals exhibit anisotropy and demonstrate a high value of upper critical magnetic field (HC2). The magnetoresistance exhibits a linear behavior as the magnetic field increases, suggesting the possible presence of a Dirac‐cone state. Anisotropy is also observed in magnetoresistance near the superconducting transition temperature (TC). The sign reversal of the Hall coefficient and the violation of Kohler's rules are observed, which provide evidence of the presence of multiband effects in FeTe0.58Se0.42 single crystals. Specific heat measurements confirm the bulk superconductivity in the grown single crystals. Additionally, the specific heat jump is estimated, which is approximately equal to . The magnetic field‐dependent specific heat also suggests multiband superconductivity and offers insights into the upper critical field. Furthermore, the electronic specific heat is best fitted with a two‐band model. Moreover, the field‐dependent residual Sommerfeld coefficient gives information about the superconducting pairing symmetry.

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“…Another ferrous compound found to display superconductivity, β-FeSe, has a critical transition temperature of ∼8 K [5]. Its superconducting transition temperature increases sharply to 14-15 K when tellurium or sulfur are substituted for selenium [6,7], to 37 K when it is prepared under hydrostatic pressure [8] and to 109 K when a single-unit cell layer of FeSe is deposited on SrTiO 3 [9]. This has opened a new door in the condensed matter physics community because FeSe contains an Fe 2 Se 2 layer of edge-shared FeSe 4 tetrahedra.…”

Section: Introductionmentioning

confidence: 99%

The effect of the sintering process on Ag–added FeSe_0.94 superconducting wire

Farisoğulları¹,

Babij²,

Karadağ³

et al. 2020

Supercond. Sci. Technol.

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We investigated the effect of different sintering processes on Ag-added FeSe 0.94 superconducting wires. After applying different sintering procedures, we successfully obtained zero resistivity, at 350 • C for 100 h and at 700 • C for 1 h, in Ag-added FeSe 0.94 superconducting wire produced using the ex-situ powder-in-tube method. The crystal structure of both wires is mainly composed of the tetragonal β-FeSe phase. Ag does not react with selenium, and it can be incorporated into the crystal structure. The transport J c value of these wires is calculated to be 24.4, and 38 A cm −2 at 4.2 K in a self-field, respectively. The low current densities of the wires are attributed to the low core-density and the presence of porosity. The upper critical field is estimated to be 16.2 and 14.6 T from Werthamer-Helfand-Hohenberg theory, respectively.

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The cooling rate effect on structure and flux pinning force of FeTeSe single crystal deposited by self-flux method

Cited by 7 publications

References 30 publications

Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals

Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals

Investigation on Magnetotransport Properties and Specific Heat Capacity of FeTe_0.58Se_0.42 Single Crystals Grown by Self‐Flux Method

The effect of the sintering process on Ag–added FeSe_0.94 superconducting wire

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The cooling rate effect on structure and flux pinning force of FeTeSe single crystal deposited by self-flux method

Cited by 7 publications

References 30 publications

Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals

Study of Structural and Magnetotransport Properties of Fe(Te, Se) Single Crystals

Investigation on Magnetotransport Properties and Specific Heat Capacity of FeTe0.58Se0.42 Single Crystals Grown by Self‐Flux Method

The effect of the sintering process on Ag–added FeSe0.94 superconducting wire

Contact Info

Product

Resources

About

Investigation on Magnetotransport Properties and Specific Heat Capacity of FeTe_0.58Se_0.42 Single Crystals Grown by Self‐Flux Method

The effect of the sintering process on Ag–added FeSe_0.94 superconducting wire